Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c8e1aba9f6925c…

MALICIOUS

PDF

39.0 KB Created: 2021-05-21 23:13:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e2315bdbdacf3bf4e0076cc947166962 SHA-1: 3046bd79dc71cffbb2a11cac60bdcdcf7284a849 SHA-256: b1c8e1aba9f6925c0ae2b891e9244c39ab1b2de3757309cddb9c85e2faa1875c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks or generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded links and the lure of free game hacks strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/479516143/minecraft-free-game-hack In PDF document text
    • http://tckontrola.hr/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003619.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3619 25436 bytes
SHA-256: 83795b6bcf26218989675280641d90e13c10cf3f663c866bce63fe16166d966b
font_01_sfnt_off00006f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7925 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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